Commit 34b06a2e authored by Long Li's avatar Long Li Committed by Jakub Kicinski
Browse files

hv_netvsc: Process NETDEV_GOING_DOWN on VF hot remove 



On VF hot remove, NETDEV_GOING_DOWN is sent to notify the VF is about to
go down. At this time, the VF is still sending/receiving traffic and we
request the VSP to switch datapath.

On completion, the datapath is switched to synthetic and we can proceed
with VF hot remove.

Signed-off-by: default avatarLong Li <longli@microsoft.com>
Reviewed-by: default avatarHaiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 8b31f8c9

drivers/net/hyperv/netvsc_drv.c

+7 −3
Original line number Diff line number Diff line
@@ -2382,12 +2382,15 @@ static int netvsc_register_vf(struct net_device *vf_netdev) 
 * During hibernation, if a VF NIC driver (e.g. mlx5) preserves the network

 * interface, there is only the CHANGE event and no UP or DOWN event.

 */

static int netvsc_vf_changed(struct net_device *vf_netdev)

static int netvsc_vf_changed(struct net_device *vf_netdev, unsigned long event)

{

	struct net_device_context *net_device_ctx;

	struct netvsc_device *netvsc_dev;

	struct net_device *ndev;

	bool vf_is_up = netif_running(vf_netdev);

	bool vf_is_up = false;



	if (event != NETDEV_GOING_DOWN)

		vf_is_up = netif_running(vf_netdev);



	ndev = get_netvsc_byref(vf_netdev);

	if (!ndev)
@@ -2716,7 +2719,8 @@ static int netvsc_netdev_event(struct notifier_block *this, 
	case NETDEV_UP:

	case NETDEV_DOWN:

	case NETDEV_CHANGE:

		return netvsc_vf_changed(event_dev);

	case NETDEV_GOING_DOWN:

		return netvsc_vf_changed(event_dev, event);

	default:

		return NOTIFY_DONE;

	}